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