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