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)(19,29)(20,25)(21,26)(22,27)(23,28)(24,31)(30,33)(32,43)(34,35)(36,42)(37,40)(38,41)(39,45)(44,47)(46,48) involution — undirected(1,3,5,11)(2,6,7,9)(4,12,13,10)(8,16,15,14)(17,18)(19,30)(20,27)(21,35)(22,25)(23,28)(24,31)(26,34)(29,33)(32,39)(36,41)(37,40)(38,42)(43,45)(44,46)(47,48)(17,19,20,31,23,33,22,37)(18,24,27,29,28,40,25,30)(21,32,34,45,36,47,38,46)(26,39,41,43,42,48,35,44)(2,7)(6,9)(8,15)(14,16)(17,20,23,22)(18,25,28,27)(19,31,33,37)(21,34,36,38)(24,30,40,29)(26,35,42,41)(32,45,47,46)(39,44,48,43)(1,4,5,13)(2,8,7,15)(3,10,11,12)(6,14,9,16)(17,21)(18,26)(19,32)(20,34)(22,38)(23,36)(24,39)(25,35)(27,41)(28,42)(29,43)(30,44)(31,45)(33,47)(37,46)(40,48)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.