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