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