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