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