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