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