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