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