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