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