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)(11,15)(12,14)(13,16)(17,18,23,29)(19,24,20,33)(21,36,39,44)(22,27,34,28)(25,32,42,31)(26,43,45,38)(30,41,35,48)(37,40,46,47)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19,23,20)(18,24,29,33)(21,37,39,46)(22,31,34,32)(25,28,42,27)(26,41,45,48)(30,43,35,38)(36,40,44,47)(10,14)(11,16)(17,20,34,32,23,19,22,31)(18,25,27,24,29,42,28,33)(21,35,43,37,39,30,38,46)(26,41,44,40,45,48,36,47)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,22,38,23,39,34,43)(18,26,28,36,29,45,27,44)(19,30,32,37,20,35,31,46)(24,40,25,41,33,47,42,48)(2,5)(6,8)(10,14)(13,15)(17,22,23,34)(18,27,29,28)(19,31,20,32)(21,38,39,43)(24,25,33,42)(26,44,45,36)(30,46,35,37)(40,41,47,48)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.