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