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