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