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