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