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