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