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