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