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