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