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