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