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