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