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