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