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