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