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