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