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