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