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