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