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