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