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