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