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