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)(10,15)(12,14)(13,16)(17,18)(19,24)(20,32,35,25)(21,26)(22,27)(23,28)(29,43,45,37)(30,38)(31,39)(33,41,34,40)(36,42)(44,48,46,47)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,19)(18,24)(20,29)(21,30)(22,36)(23,31)(25,37)(26,38)(27,42)(28,39)(32,43)(33,44)(34,46)(35,45)(40,47)(41,48)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,20)(18,25)(19,29)(21,33)(22,34)(23,35)(24,37)(26,40)(27,41)(28,32)(30,44)(31,45)(36,46)(38,47)(39,43)(42,48)(2,8)(6,9)(7,16)(14,15)(17,21,23,22)(18,26,28,27)(19,30,31,36)(20,33,35,34)(24,38,39,42)(25,40,32,41)(29,44,45,46)(37,47,43,48)(17,22,23,21)(18,27,28,26)(19,30,31,36)(20,34,35,33)(24,38,39,42)(25,41,32,40)(29,44,45,46)(37,47,43,48)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.