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