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