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