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