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