One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,9)(6,10)(11,14)(12,15)(13,16)(20,28)(24,31)(26,32)(29,30)(34,40)(35,43)(36,45)(42,47) involution — undirected(3,10)(6,7)(11,16)(13,14)(17,18)(19,23)(20,24)(21,25)(22,27)(26,30)(28,31)(29,32)(33,34,39,40)(35,38,43,48)(36,46,45,41)(37,42,44,47)(1,3)(2,6)(4,11)(5,10)(7,9)(8,13)(12,16)(14,15)(17,19)(18,22)(20,26)(21,27)(23,25)(24,29)(28,32)(30,31)(33,35,39,43)(34,38,40,48)(36,44,45,37)(41,42,46,47)(1,3)(2,7)(4,11)(5,10)(6,9)(8,14)(12,16)(13,15)(17,19)(18,23)(20,26)(21,27)(22,25)(24,30)(28,32)(29,31)(33,36)(34,41)(35,44)(37,43)(38,42)(39,45)(40,46)(47,48) involution — undirected(1,4,5,12)(2,8,9,15)(3,11,10,16)(6,13,7,14)(17,20)(18,24)(19,26)(21,28)(22,29)(23,30)(25,31)(27,32)(33,37,39,44)(34,42,40,47)(35,36,43,45)(38,46,48,41)(1,2)(3,6)(4,8)(5,9)(7,10)(11,13)(12,15)(14,16)(17,18)(19,22)(20,24)(21,25)(23,27)(26,29)(28,31)(30,32)(33,38)(34,43)(35,40)(36,47)(37,46)(39,48)(41,44)(42,45) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.