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