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