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