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