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