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