One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,11)(5,6)(8,12)(9,13)(10,16)(14,15)(17,18)(19,27)(20,30)(21,26)(22,24)(23,25)(28,32)(29,31) involution — undirected(3,9)(7,13)(10,15)(14,16)(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)(2,6)(7,13)(8,11)(14,16)(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)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(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)(1,3,5,9)(2,7,6,13)(4,10,12,15)(8,14,11,16)(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)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(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.