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