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)(17,18,23,27)(19,21,29,24)(20,30,28,25)(22,26,32,31)(1,3,5,8)(2,6,7,4)(9,11,12,15)(10,13,14,16)(17,19,23,29)(18,24,27,21)(20,22,28,32)(25,26,30,31)(2,7)(3,8)(9,10)(11,13)(12,14)(15,16)(17,20,23,28)(18,25,27,30)(19,22,29,32)(21,31,24,26)(3,8)(4,6)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,22)(21,27)(23,29)(25,26)(28,32)(30,31) involution — undirected(1,2)(3,4)(5,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,21,23,24)(18,19,27,29)(20,26,28,31)(22,25,32,30)(1,4)(2,3)(5,6)(7,8)(17,22)(18,26)(19,28)(20,29)(21,25)(23,32)(24,30)(27,31) 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.