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