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