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