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