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