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