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