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