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