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