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)(13,14,19,24,18,23,17,22)(15,20,25,16,21,27,26,28)(5,6)(7,10)(8,11)(9,12)(13,15)(14,16)(17,25)(18,21)(19,26)(20,24)(22,27)(23,28) involution — undirected(1,2,3,4)(5,7,10,6)(8,11,9,12)(13,15)(14,20)(16,24)(17,26)(18,21)(19,25)(22,28)(23,27)(5,8,10,9)(6,11,7,12)(13,16,17,20,18,28,19,27)(14,21,22,25,23,15,24,26)(5,9,10,8)(6,11,7,12)(13,17,18,19)(14,22,23,24)(15,25,21,26)(16,27,28,20)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.