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