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