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