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