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