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