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