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