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