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