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