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