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