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