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