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