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