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