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