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