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