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