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