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