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