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