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