One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,12)(5,7)(6,11)(8,14)(10,16)(13,15)(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(1,3)(2,6)(4,13)(5,10)(7,15)(8,16)(9,12)(11,14)(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)(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)(2,7)(3,10)(8,12)(11,13)(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.