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