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