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