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