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