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