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