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