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