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