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