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