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