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