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