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