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