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