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