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