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