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