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)(17,18,21,26,23,19,22,24)(20,25,29,32,30,27,28,31)(2,5)(6,8)(18,24)(19,26)(20,28)(21,22)(25,27)(29,30) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,19,21,24,23,18,22,26)(20,25,29,32,30,27,28,31)(17,20,21,29,23,30,22,28)(18,25,26,32,19,27,24,31)(9,11,12,15)(10,14,13,16)(18,19)(24,26)(25,27)(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.