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