One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,8)(5,10)(6,7)(11,16)(12,13)(14,15)(17,18)(19,25)(20,24)(21,23)(22,27)(26,32)(28,30)(29,31)(33,34,38,41)(35,37,43,39)(36,40,44,47)(42,45,48,46)(1,3)(2,5)(4,12)(6,10)(7,9)(8,16)(11,14)(13,15)(17,19)(18,22)(20,26)(21,27)(23,25)(24,30)(28,29)(31,32)(36,44)(40,47)(42,48)(45,46) involution — undirected(2,7)(3,10)(8,15)(11,12)(18,23)(22,25)(24,31)(30,32)(33,35,38,43)(34,39,41,37)(36,42,44,48)(40,46,47,45)(1,3)(2,5)(4,11)(6,10)(7,9)(8,13)(12,14)(15,16)(17,18)(19,22)(20,24)(21,23)(25,27)(26,30)(28,32)(29,31)(33,35)(34,37)(36,42)(38,43)(39,41)(40,45)(44,48)(46,47) involution — undirected(1,4,6,14)(2,8,7,15)(3,11,10,12)(5,13,9,16)(17,20,21,29)(18,24,23,31)(19,26,27,28)(22,30,25,32)(33,36)(34,40)(35,42)(37,45)(38,44)(39,46)(41,47)(43,48)(1,5)(2,3)(4,13)(6,9)(7,10)(8,11)(12,15)(14,16)(17,19)(18,22)(20,28)(21,27)(23,25)(24,32)(26,29)(30,31)(33,37)(34,35)(36,45)(38,39)(40,42)(41,43)(44,46)(47,48) 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.