One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,13,15,16)(17,18)(19,27)(20,32)(21,24)(22,35)(23,29)(25,28)(26,33)(30,39)(31,46)(34,47)(36,45)(37,48)(38,43)(40,42)(41,44)(1,3,4,8)(2,5,6,7)(9,11)(10,13)(12,15)(14,16)(17,19,28,42,22,31,34,45,21,30,43,48,33,44,20,29)(18,23,32,41,26,37,38,39,24,36,47,46,35,40,25,27)(2,6)(5,7)(11,15)(13,16)(18,24)(23,36)(25,38)(26,35)(27,39)(32,47)(37,40)(41,46) involution — undirected(2,6)(5,7)(17,19,28,42,22,31,34,45,21,30,43,48,33,44,20,29)(18,23,32,41,26,37,38,39,24,36,47,46,35,40,25,27)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.