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