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