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