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