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