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