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