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