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