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