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)(17,18,23,20)(19,21,24,26)(22,28,31,25)(27,30,32,29)(33,34)(35,45)(36,39)(37,46)(38,42)(40,44)(41,48)(43,47)(2,7)(4,8)(9,15)(12,13)(17,19)(18,21)(20,26)(22,27)(23,24)(25,29)(28,30)(31,32)(33,35)(34,41)(36,46)(37,42)(38,43)(39,47)(40,48)(44,45) involution — undirected(18,20)(19,24)(25,28)(27,32)(33,36,40,38)(34,42,44,39)(35,46,48,43)(37,45,47,41)(1,3)(2,8)(4,7)(5,10)(6,11)(9,13)(12,15)(14,16)(17,20,23,18)(19,26,24,21)(22,28,31,25)(27,30,32,29)(33,37,40,47)(34,43,44,46)(35,42,48,39)(36,41,38,45)(1,4,6,8)(2,3,7,11)(5,13,14,12)(9,16,15,10)(17,21,23,26)(18,24,20,19)(22,30,31,29)(25,27,28,32)(33,38,40,36)(34,42,44,39)(35,43,48,46)(37,45,47,41)(1,5,6,14)(2,9,7,15)(3,10,11,16)(4,12,8,13)(17,22)(18,25)(19,27)(20,28)(21,29)(23,31)(24,32)(26,30)(33,39,40,42)(34,38,44,36)(35,47,48,37)(41,43,45,46)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.