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