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