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