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