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