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