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)(19,24)(20,31)(21,26)(22,35)(23,27)(25,32)(28,43)(29,38)(30,39)(33,41)(34,40)(36,42)(37,46)(44,48)(45,47)(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,19,23,29)(18,24,27,38)(20,28,33,44)(21,34,22,30)(25,37,42,47)(26,40,35,39)(31,43,41,48)(32,46,36,45)(3,8)(5,7)(10,13)(14,16)(17,20)(18,25)(19,28)(21,32)(22,36)(23,33)(24,37)(26,41)(27,42)(29,44)(30,45)(31,35)(34,46)(38,47)(39,43)(40,48) involution — undirected(2,6)(5,7)(9,11,12,15)(10,14,13,16)(19,29)(24,38)(28,44)(30,34)(37,47)(39,40)(43,48)(45,46)(10,13)(14,16)(17,21,23,22)(18,26,27,35)(19,30,29,34)(20,32,33,36)(24,39,38,40)(25,41,42,31)(28,45,44,46)(37,43,47,48)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.