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