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