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