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