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