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