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