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