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