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