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