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