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